sticks-and-clay chimney

clay-and-sticks chimney

A chimney constructed of clay or mud and sticks, and then coated on the interior with clay, mud, or plaster to provide some protection against setting the chimney on fire; used in homes in many frontier areas where bricks, stones, and lime mortar were not available.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.